Physics Exam Past Questions and Answers | JAMB, WAEC and NECO

Physics is the science that studies the nature and properties of matter and energy. It covers topics like motion, heat, light, sound, electricity, magnetism, and the structure of atoms.

• Question 851:

  The density of 400cm³ of palm oil was 0.9gcm^-3 before frying. If the density of the oil was 0.6gcm^-3 after frying, assuming no loss of oil due to spilling, its new volume was?

  Options:
  A) 1360cm${}^3$
  B) 600cm${}^3$
  C) 240cm${}^3$
  D) 8000m${}^3$
  Show Answer
  The correct answer is B .
• Question 852:

  

  The total power drawn from the cell in the circuit above is

  Note: The cell voltage is 12V and all three resistors are 4 ohm resistors.

  Options:
  A) 12W
  B) 24W
  C) 32W
  D) 40W
  Show Answer
  The correct answer is B .
• Question 853: Which of the following statements is NOT true of the image in a plane mirror? The image is Options:
  A) the same size as the object
  B) laterally inverted
  C) virtual
  D) magnified
  E) the same distance behind the mirror as the object is in front
  Show Answer
  The correct answer is D .
• Question 854: Mercury does NOT wet glass because Options:
  A) glass is an amorphous substance
  B) the adhesive force is greater than the cohesive force
  C) the cohesive force is greater than the adhesive force.
  D) mercury has very high thermal conductivity
  E) mercury is opaque.
  Show Answer
  The correct answer is C .
• Question 855:

  A man stands 4m in front of a plane mirror. If the mirror is moved 1m towards the man, the distance between him and his new image is?

  Options:
  A) 3m
  B) 5m
  C) 6m
  D) 10m
  Show Answer
  The correct answer is C .
• Question 856: A liquid of mass 1.0 x 10³kg fills a rectangular tank of length 2.5m and width 2.0m. If the tank is 4m high, what is the pressure at the middle of the tank?[g = 10ms^-2] Options:
  A) 1.0 x 10⁴Nm^-2
  B) 2.0 x 10³Nm^-2
  C) 1.5 x 10³Nm^-2
  D) 1.0 x 10³Nm^-2
  Show Answer
  The correct answer is D .
• Question 857: The resistance of an open series circuit is Options:
  A) zero
  B) half the normal resistance of the circuit
  C) double the normal resistance of the circuit
  D) one
  E) infinite
  Show Answer
  The correct answer is E .
• Question 858: When impurities are added to semi-conductors, the conductivity of the semi-conductor Options:
  A) increases then decreases
  B) increases
  C) decreases
  D) remains constant
  Show Answer
  The correct answer is B .
• Question 859: A series RLC circuit is said to resonate, when Options:
  A) capacitive reactance is zero
  B) conductance is maximum
  C) current is minimum
  D) impedance is minimum
  E) inductive reactance is zero
  Show Answer
  The correct answer is D .
• Question 860: A hydraulic press has a large circular piston of radius 0.8m and a circular plunger of radius 0.2m. A force of 500N is exerted by the plunger. Find the force exerted on the piston Options:
  A) 8000N
  B) 4000N
  C) 2000N
  D) 31N
  Show Answer
  The correct answer is D .